It was incredibly hard to work in the fields under the flaming sun.
I worked all day long and was soaked to the skin with sweat.
Almost everyone who works outside in summer puts on an essential item called 空調服 (Kūchōfuku) to deal with the deadly heatwaves.
In a word, 空調服 is something like air-cooled clothing equipped with battery-powered fans (pic related).
For your information, today's high was 39.4℃ observed at Fukuchiyama, Kyoto.